Vroomen Jean, Baart Martijn
Tilburg University, Dept. of Psychology, Tilburg, The Netherlands.
Lang Speech. 2009;52(Pt 2-3):341-50. doi: 10.1177/0023830909103178.
Listeners hearing an ambiguous speech sound flexibly adjust their phonetic categories in accordance with lipread information telling what the phoneme should be (recalibration). Here, we tested the stability of lipread-induced recalibration over time. Listeners were exposed to an ambiguous sound halfway between /t/ and /p/ that was dubbed onto a face articulating either /t/ or /p/. When tested immediately, listeners exposed to lipread /t/ were more likely to categorize the ambiguous sound as /t/ than listeners exposed to /p/. This aftereffect dissipated quickly with prolonged testing and did not reappear after a 24-hour delay. Recalibration of phonetic categories is thus a fragile phenomenon.
听到模糊语音的听众会根据唇读信息灵活调整他们的语音类别，唇读信息会告知这个音素应该是什么（重新校准）。在此，我们测试了唇读诱导的重新校准随时间的稳定性。让听众接触一个介于/t/和/p/之间的模糊音，这个音被配到一个发出/t/或/p/的面部上。立即进行测试时，接触到唇读/t/的听众比接触/p/的听众更有可能将这个模糊音归类为/t/。随着测试时间延长，这种后效迅速消散，并且在延迟24小时后没有再次出现。因此，语音类别的重新校准是一种脆弱的现象。
